e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH Gen4-Brose S Mag-TQ HPR50 26.5mm Offset 165mm Self Extractor BLK CheckoutTitle=Cane Creek ZN40-Bearing 52mm 45 x 45 Zinc } Laser cut

} Laser cut

} Made from 6061 alloy

Cam actuated micro adjustable clamp allows quick entry and exit and fits 1" to 3" (25mm–76mm) diameter tubes and seat posts of any shape and material

Lightweight two-piece design

The M3 dual width tooth profile eliminates chain noise and decreases overall system wear

e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH Gen4-Brose S Mag-TQ HPR50 26.5mm Offset 165mm Self Extractor BLK CheckoutTitle=Cane Creek ZN40-Bearing 52mm 45 x 45 Zinc } Laser cutHelix R e*spec AL Crank Arm Set 165mm BOSCH Gen4 Brose S Mag TQ HPR50 with Self Extractor Bronze. A high performance weight optimized alternative to carbon fiber for riders who prefer alloy cranks. These 24mm ISIS interface cranks are engineered for compatibility with Bosch Gen 4 Brose S Mag TQ HPR 50 Fazua Yamaha Maxon and Specialized Brose motor systems. They come in short lengths starting at 155mm for improved pedal clearance and are tested to E